[A device for measuring body posture during work].

The study was aimed at designing, performing and testing the tool enabling observation of the duration of the trunk inclination under the fibular plane and specific angles in professional work. Admittedly, the most ethiopathogenetic factor of an algesic syndrome in the lower part of the spine is the load resulting mainly from long-lasting trunk anteversion. The tool consists of a gravitating inclination sensor which switches on, with the programmed inclination angle, the quartz time meter.